In our organization, there is a 10MB limit on email attachment size (through Exchange 2013). Most of our clients have another POP3/IMAP account too (in Outlook, besides their Exchange account). The problem is that when they want to attach files larger than 10MB to emails which are being sent from their POP3/IMAP account, Outlook 2016 prevents them with this message: "The file you're attaching is bigger than the server allows. Try putting the file in a shared location and sending a link instead.". How can we solve this "conflict"?
Outlook 2016 applies Exchange attachment size limits to other POP3/IMAP account
attachmentexchangeoutlook-2016pop3
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Best Answer
There is one step missing in the above solution.
Here is how you need to do it.
Mailbox features
>Message Size restrictions
.regedit.exe
HKEY_Current_Users
>Software
>Office
>Outlook
>Preferences
MaximumAttachementSize
. Give it value 0 and hit Save.